
# a = [1, 2, 3, 4, 5]
# # for elem in a:
# #     print(elem)
#
# a.append(77)
# a.append('hello')
# print(a)


# a = [1, 2, 3, 4, 5]
# a.insert(1, 'hello')
# print(a)

a = [1, 2, 3, 4]
print(a.index(2))